:root{--spacing-1: 8px;--spacing-2: 16px;--spacing-3: 24px;--spacing-4: 32px;--spacing-5: 40px;--spacing-6: 48px;--spacing-8: 64px;--line-height-tight: 1.2;--line-height-base: 1.5;--line-height-relaxed: 1.75;--letter-spacing-tight: -.02em;--letter-spacing-normal: 0em;--letter-spacing-wide: .025em;--slate-50: #f8fafc;--slate-100: #f1f5f9;--slate-200: #e2e8f0;--slate-300: #cbd5e1;--slate-400: #94a3b8;--slate-500: #64748b;--slate-600: #475569;--slate-700: #334155;--slate-800: #1e293b;--slate-900: #0f172a;--primary: #2563eb;--primary-dark: #1d4ed8;--primary-light: #3b82f6;--success: #10b981;--success-light: #34d399;--error: #ef4444;--error-light: #f87171;--warning: #f59e0b;--warning-light: #fbbf24;--gray-50: #f8fafc;--gray-100: #f1f5f9;--gray-200: #e2e8f0;--gray-300: #cbd5e1;--gray-400: #94a3b8;--gray-500: #64748b;--gray-600: #475569;--gray-700: #334155;--gray-800: #1e293b;--gray-900: #0f172a;--glass-bg: rgba(255, 255, 255, .8);--glass-border: rgba(226, 232, 240, .8);--glass-shadow: 0 1px 3px rgba(0, 0, 0, .05);--gradient-success: linear-gradient(135deg, #10b981 0%, #34d399 100%);--gradient-error: linear-gradient(135deg, #ef4444 0%, #f87171 100%);--gradient-primary: linear-gradient(135deg, #2563eb 0%, #3b82f6 100%);--gradient-gold: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);--gradient-silver: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);--gradient-bronze: linear-gradient(135deg, #d97706 0%, #92400e 100%);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .03);--shadow-md: 0 2px 4px -1px rgba(0, 0, 0, .05), 0 1px 2px -1px rgba(0, 0, 0, .03);--shadow-lg: 0 4px 6px -2px rgba(0, 0, 0, .05), 0 2px 4px -2px rgba(0, 0, 0, .03);--shadow-xl: 0 8px 12px -4px rgba(0, 0, 0, .05), 0 4px 6px -2px rgba(0, 0, 0, .03);--shadow-2xl: 0 12px 24px -6px rgba(0, 0, 0, .08)}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,Noto Sans Bengali,system-ui,-apple-system,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;background:#fff;color:var(--slate-900);line-height:var(--line-height-base);letter-spacing:var(--letter-spacing-normal);position:relative}#root{min-height:100vh;width:100%;background:#fff;position:relative}#root:before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;background:radial-gradient(ellipse 85% 65% at 8% 8%,rgba(175,109,255,.42),transparent 60%),radial-gradient(ellipse 75% 60% at 75% 35%,rgba(255,235,170,.55),transparent 62%),radial-gradient(ellipse 70% 60% at 15% 80%,rgba(255,100,180,.4),transparent 62%),radial-gradient(ellipse 70% 60% at 92% 92%,rgba(120,190,255,.45),transparent 62%),linear-gradient(180deg,#f7eaff,#fde2ea)}#root>*{position:relative;z-index:1}.bengali{font-family:Noto Sans Bengali,Inter,sans-serif}html{scroll-behavior:smooth}@media (max-width: 640px){body{-webkit-tap-highlight-color:transparent;-webkit-touch-callout:none;font-size:16px}input,textarea,select{font-size:16px}button,a,input[type=button],input[type=submit]{min-height:44px;min-width:44px}}.glass-card{background:var(--glass-bg);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid var(--glass-border);box-shadow:var(--glass-shadow)}.animate-fade-in{animation:fadeIn .4s ease-out}.animate-scale-in{animation:scaleIn .4s ease-out}.animate-slide-up{animation:slideUp .5s ease-out}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes scaleIn{0%{opacity:0;transform:scale(.9)}to{opacity:1;transform:scale(1)}}@keyframes slideUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.icon-check,.icon-cross,.icon-dash{display:inline-flex;align-items:center;justify-content:center;width:16px;height:16px;border-radius:50%;position:relative;flex-shrink:0}.icon-check{background:var(--success);color:#fff}.icon-check:after{content:"";width:5px;height:9px;border:solid white;border-width:0 2px 2px 0;transform:rotate(45deg) translateY(-1px)}.icon-cross{background:var(--error);color:#fff}.icon-cross:before,.icon-cross:after{content:"";position:absolute;width:10px;height:2px;background:#fff}.icon-cross:before{transform:rotate(45deg)}.icon-cross:after{transform:rotate(-45deg)}.icon-dash{background:var(--slate-400);color:#fff}.icon-dash:after{content:"";width:8px;height:2px;background:#fff}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}.katex{font-size:1em!important;line-height:1!important;display:inline!important;vertical-align:middle!important;margin:0!important;padding:0!important}.katex-display{margin:8px 0!important;padding:4px 0!important}.katex-html{display:inline!important;line-height:inherit!important}.katex .base{display:inline!important;vertical-align:middle!important}.question-text .katex,.option-text .katex{display:inline!important;vertical-align:baseline!important;line-height:1!important}.katex span{line-height:1!important}